Browse Publications Technical Papers 2012-01-1339
2012-04-16

A Novel Closed Loop Control based on Ionization Current in Combustion Cycle at Cold Start in a GDI Engine 2012-01-1339

As the invalidation of the oxygen sensor in the initial cycles at cold start, the engine can not operate based on the closed loop control based on oxygen sensor. And it may result in the misfire events and higher hydrocarbon (HC) emissions during this period. To solve this problem, a novel closed loop control based on ionization current in combustion cycle is proposed. The in-cylinder combustion quality is monitored by means of the ion current detection technique; meanwhile, if the misfire event is detected in the combustion cycle, the spark re-ignition is made in the current combustion cycle. In addition, to optimize the combustion and reduce HC emissions during cold start, the fuel injection quantity and ignition timing in the next cycle are adjusted based on the current ion current signal. The results show that, it is feasible that the closed loop control in current combustion cycle based on ion current of gasoline direct injection (GDI) engine at cold start is completed by means of the ionization detection technique. Also, the combustion process is optimized, resulting in the decrease both in misfire events and engine-out HC emissions.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

An Improvement of a Small Displacement Engine's Efficiency with a Super Charging System

2011-32-0571

View Details

TECHNICAL PAPER

Study on Lean Burn Gas Engine Using Pilot Oil as the Ignition Source

2001-01-0143

View Details

TECHNICAL PAPER

Expansion of the Operating Range with In-Cylinder Water Injection in a Premixed Charge Compression Ignition Engine

2002-01-1743

View Details

X